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Assignment 12
Assignment 12, Continued - 14081_642

Equipment Operator Basic - Beginning construction equipment operators manual
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12-9. Both  rigid  and  flexible  paving consist of which of the following materials? 1. Sand and gravel 2. Crushed  stone 3. Binder 4. All of the above 12–10. In  addition  to  the  asphalt content,  what  other  factor determines  the  principal characteristics  of  asphalt -paving  mixes? 1. The total weight of both the  asphalt  content  and aggregates 2. The relative amount of aggregates 3. The  largest  size  aggregate used 4. The type of roadbed the asphalt is used on 12–11. Asphalts  are  produced  from refineries in many types and grades. The one known as asphalt cement is the basic material used in asphalt paving and is produced in which of the following conditions? 1. Hard 2. Brittle 3. Semisolid 4. Water  thin 12–12. Which  of  the  following  properties is essential for an asphalt- wearing  surface? 1. Retention  of  antiskid properties 2. Resistant  to  wear 3. The  capability  to  shed surface  water 4. All of the above 12–13. What term is used to describe the operation  of  adding  more  layers  of asphalt to a pavement to increase its  weight-bearing  surface? 12-14. A  load-bearing  test  commonly  used by the Seabees is the CBR test. What does CBR represent? 1. Course  base  repair 2. California  bearing  ratio 3. California  base  rate 4. Cold-bearing  rate Learning  Objective: Recognize  the principles  of  preparing  asphalt for  construction  operations. 12-15. Asphalt cement can be made temporarily  fluid  (liquefied)  for construction operation in what three  ways? 1. Emulsifying  with  water, melting, and crushing 2. Melting,  dissolving,  and crushing 3. Heating,  dissolving,  and emulsifying 4. Crushing,  heating,  and dissolving 12-16. The aggregate and binder of a hot-mix  paving  mixture  should be heated to what temperature, in  degrees  Fahrenheit? 1. 110°F 2. 200°F 3. 310°F 4. 400°F 12-17. Blue  smoke  rising  from  the spreader  hopper  is  often  an indication of which of the following  asphalt  conditions? 1. The  mix  is  overheated 2. The mix is too cold 3. The mix is too rich 4. The mix is too lean 1. Surface  treatment 2. Asphalt  addition 3. Stage  construction 4. Subgrade  elevation 89







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